JPH02128404A - Manufacture of rare-earth permanent magnet - Google Patents
Manufacture of rare-earth permanent magnetInfo
- Publication number
- JPH02128404A JPH02128404A JP63282218A JP28221888A JPH02128404A JP H02128404 A JPH02128404 A JP H02128404A JP 63282218 A JP63282218 A JP 63282218A JP 28221888 A JP28221888 A JP 28221888A JP H02128404 A JPH02128404 A JP H02128404A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- mentioned
- decreases
- weight percentage
- ihc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 13
- 150000002910 rare earth metals Chemical class 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 4
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 11
- 230000007423 decrease Effects 0.000 abstract description 9
- 229910052802 copper Inorganic materials 0.000 abstract description 6
- 229910052726 zirconium Inorganic materials 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 230000004907 flux Effects 0.000 abstract description 3
- PLDDOISOJJCEMH-UHFFFAOYSA-N neodymium oxide Inorganic materials [O-2].[O-2].[O-2].[Nd+3].[Nd+3] PLDDOISOJJCEMH-UHFFFAOYSA-N 0.000 abstract description 3
- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 description 12
- 239000010949 copper Substances 0.000 description 12
- 229910045601 alloy Inorganic materials 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 5
- 229910017985 Cu—Zr Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910002549 Fe–Cu Inorganic materials 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000009702 powder compression Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、希土類元素と遷移金属を主成分とするＲｇＭ
＋７系（但しＲはＹ（イツトリウム）を含む希土類元素
、Ｍは主として遷移金属）永久磁石の製造方法に関し、
更に詳しくは銅とジルコニウムの他に希土類酸化物を適
量添加する希土類永久磁石の製造方法に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to RgM containing rare earth elements and transition metals as main components.
Regarding the manufacturing method of permanent magnets of the +7 series (where R is a rare earth element containing Y (yttrium), and M is mainly a transition metal),
More specifically, the present invention relates to a method for manufacturing rare earth permanent magnets in which an appropriate amount of rare earth oxide is added in addition to copper and zirconium.
［従来の技術］
ＲＣｏ−Ｆｅ−Ｃｕ系の２−１７型希土類永久磁石材料
は従来公知である。この系の合金材料において、Ｃｕの
添加は保磁力を高める効果があり１０重量％以上は必要
であるとされていた。しかしＣｕの添加量が増大すると
残留磁束密度Ｂｒが低下してしまう問題が生じる。[Prior Art] RCo-Fe-Cu type 2-17 rare earth permanent magnet materials are conventionally known. In this type of alloy material, the addition of Cu has the effect of increasing coercive force, and it has been said that 10% by weight or more is necessary. However, when the amount of Cu added increases, a problem arises in that the residual magnetic flux density Br decreases.
この問題を解決するため、更に適量のＺｒ（ジルコニウ
ム）を添加することにより低Ｃｕ量の組成で保磁力ｉＨ
ｃ及び最大エネルギー積ＢＨｍａｘを高め得る技術が報
告されている（例えば特公昭５５−４７０９７号、特公
昭５５４８０９４号）。In order to solve this problem, we added an appropriate amount of Zr (zirconium) to increase the coercive force iH with a composition with a low Cu content.
Techniques capable of increasing c and the maximum energy product BHmax have been reported (for example, Japanese Patent Publication No. 55-47097 and Japanese Patent Publication No. 5548094).
［発明が解決しようとする課題］ Ｃｕの添加量を抑えた組成でのＲ−Ｃ。[Problem to be solved by the invention] R-C with a composition that suppresses the amount of Cu added.
Ｆｅ−Ｃｕ−Ｚｒ系合金に限っては、非磁性であるＣｕ
量を少なくしたことにより残留磁束密度Ｂｒが向上し、
その結果として最大エネルギー積ＢＨｍａｘを高めた磁
石合金を得ることができる。しかし従来技術では保磁力
ｉ Ｈｃはまだ不十分であり、改善の余地は大きい。As for Fe-Cu-Zr alloys, non-magnetic Cu
By reducing the amount, the residual magnetic flux density Br is improved,
As a result, a magnet alloy with increased maximum energy product BHmax can be obtained. However, in the conventional technology, the coercive force i Hc is still insufficient, and there is a large room for improvement.
本発明の目的は、Ｃｕ量が１〜１０重量％という低い領
域でｉＨｃを高め、従来品より高いＢＨｍａｘを有する
希土類永久磁石を製造する方法を提供することにある。An object of the present invention is to provide a method for producing a rare earth permanent magnet that increases iHc in a low Cu content range of 1 to 10% by weight and has a higher BHmax than conventional products.
［課題を解決するための手段］
本発明者はＲ−Ｃｏ−Ｆｅ−Ｃｕ−Ｚｒ系の希土類永久
磁石材料に関し、ｉＨｃを実用範囲まで高めること、そ
れによって１３Ｈｍａｙを向上させることについて種々
検討した結果、ＲＣｏ−Ｆｅ−Ｃｕ−Ｚｒ系に適当な希
土類酸化物を適量添加することによって前記目的を達成
できることを見出し、本発明を完成させるに至ったもの
である。[Means for Solving the Problems] The present inventor has conducted various studies on increasing iHc to a practical range and thereby improving 13Hmay regarding R-Co-Fe-Cu-Zr rare earth permanent magnet materials. The inventors have discovered that the above object can be achieved by adding an appropriate amount of a suitable rare earth oxide to the RCo-Fe-Cu-Zr system, and have completed the present invention.
即ち本発明は、１２〜２８重量％のＲ（但しＲはイツト
リウムを含む希土類元素の１種もしくは２種以上）、５
〜１６重景％重量ｅ、１〜１０重量％のＣｕ、０１５〜
６重量％のＺｒ。That is, the present invention provides 12 to 28% by weight of R (where R is one or more rare earth elements including yttrium), 5
~16 weight% weight e, 1-10 weight% Cu, 015~
6% by weight Zr.
０．０５−１０重量％のＸ（但しＸはＳｍ２Ｏ３及び／
又はＮｄ２Ｏ３） 、残部が実質的にＣ０からなる材料
を、成形し焼結する希土類永久磁石の製造方法である。0.05-10% by weight of X (where X is Sm2O3 and/or
or Nd2O3), the remainder of which is substantially C0, is formed and sintered to produce a rare earth permanent magnet.
本発明の特徴は上記のようにＲ−ｃｏ−ＦｅＣｕ−Ｚｒ
系の組成において、Ｃｕ量を抑え適量のＺｒと希土類酸
化物を添加する点にある。The feature of the present invention is as mentioned above that R-co-FeCu-Zr
The key point in the system composition is to suppress the amount of Cu and add appropriate amounts of Zr and rare earth oxides.
本発明における合金の組成比率は全て以下に述べる実施
例に示すような実験結果に基づいている。Ｒの比率は、
別に酸化物の形で添加するため、この種の３元系組成物
で一般的に使用されているものよりも低い範囲にまで及
ぶ。Ｃ。The composition ratios of the alloys in the present invention are all based on experimental results as shown in the Examples described below. The ratio of R is
Since it is added separately in the form of an oxide, it extends to a lower range than that commonly used in ternary compositions of this type. C.
Ｆｅの比率は、この種の３元系組成物で一般的に使用さ
れているものとほぼ同様である。The proportion of Fe is approximately similar to that commonly used in ternary compositions of this type.
Ｒを１２〜２８重量％とじたのは、１２重量％未満では
１）（ｃが小さく、２８重量％を超えるとＢｒが低下す
るからである。Ｆｅを５〜１６重量％とじたのは、５重
量％未満ではＢｒが低く１６重量％を超えるとｉ Ｈｃ
が低下し、そのためＢＨｍａｘ も減少するからである
。The reason why R is limited to 12 to 28% by weight is because 1) (c) is small when it is less than 12% by weight, and Br decreases when it exceeds 28% by weight.The reason why it is limited to 5 to 16% by weight is that If it is less than 5% by weight, Br is low and if it exceeds 16% by weight, i Hc
This is because BHmax also decreases.
Ｃｕの量を１〜１０重量％とじたのは、１重量％未満で
はｉＨｃが著しく低下し、１０重量％を超えるとＢｒが
著しく低下するからである。The reason why the amount of Cu is limited to 1 to 10% by weight is that if it is less than 1% by weight, iHc will be significantly lowered, and if it exceeds 10% by weight, Br will be significantly lowered.
Ｚｒの量を０．５〜６重量％とじたのは、０゜５重量％
未満ではｉＨｃが低下し、６重量％を超えるとＢｒが小
さくなるからである。Ｘ（ＸはＳｍ２ｏ３及び／又はＮ
ｄ ２Ｏ３）の量を０．０５〜１０重量％としたのは
、１０重重量を超えるとＢｒが低下するからである。The amount of Zr is 0.5 to 6% by weight, which is 0.5% by weight.
This is because if it is less than 6% by weight, iHc decreases, and if it exceeds 6% by weight, Br decreases. X (X is Sm2o3 and/or N
The reason why the amount of d2O3) is set to 0.05 to 10% by weight is that if it exceeds 10% by weight, Br decreases.
このような特定の組成を採用することによってｉＨｃを
実用範囲まで高め、結果として高いＢＨｍａｘを得るこ
とができる。By employing such a specific composition, iHc can be increased to a practical range, and as a result, a high BHmax can be obtained.
なお３ｍ２Ｏｓ 、Ｎｄ２Ｏ３は焼結時に還元され組織
的には酸化物の形では残存しない。Note that 3m2Os and Nd2O3 are reduced during sintering and do not remain in the form of oxides.
［実施例１コ
（合金の組成ａ・・・本発明品方法）
Ｓｍ＝２２．０重量％、Ｆｅ＝１２．９重量％、Ｃｕ量
６．１重量％、Ｚｒ＝２．３重量％、Ｓｍｚ ｏｌ ＝
３．２重量％、残部がＣＯからなる。[Example 1 (alloy composition a...method of the present invention) Sm = 22.0% by weight, Fe = 12.9% by weight, Cu amount 6.1% by weight, Zr = 2.3% by weight, Smz ol =
3.2% by weight, the balance being CO.
（前工程ａ・・・本発明方法）
必要とする合金材料を高周波溶解炉で溶解し、ショーク
ラッシャによって粗粉砕した後、更にジェットミルによ
り約３μｍまで微粉砕した。(Pre-step a...method of the present invention) The required alloy material was melted in a high frequency melting furnace, coarsely pulverized in a show crusher, and further finely pulverized to about 3 μm in a jet mill.
この微粉砕粉体と約３μｍに粉砕した希土類酸化物の微
粉体とをボールミルで混合した。この混合粉体を１５ｋ
Ｏｅの磁場中で成形圧ｌ ｔｏｎ／ｃｍ”で圧縮成形し
た。This finely pulverized powder and rare earth oxide fine powder pulverized to about 3 μm were mixed in a ball mill. 15k of this mixed powder
Compression molding was performed in a magnetic field of Oe at a molding pressure of 1 ton/cm''.
（合金の組成り・・・従来品方法）
Ｓｍ＝２４．１重量％、Ｆｅ＝１２．９重量％、Ｃｕ量
６．１重量％、Ｚｒ＝２．３重量％、残部がＣＯからな
る。(Alloy composition: conventional product method) Sm = 24.1% by weight, Fe = 12.9% by weight, Cu amount 6.1% by weight, Zr = 2.3% by weight, the balance being CO.
（前工程ｂ・・・従来方法）
必要とする合金材料を高周波溶解炉で溶解し、ショーク
ラッシャによって粗粉砕した後、更にジェットミルによ
り約３μｍまで微粉砕した。(Pre-step b: conventional method) The required alloy material was melted in a high frequency melting furnace, coarsely pulverized in a show crusher, and further finely pulverized to about 3 μm in a jet mill.
この微粉砕粉体を１５ｋＯｅの磁場中で成形圧１ ｔｏ
ｎ／ｃｍ２で圧縮成形した。This finely pulverized powder was molded in a magnetic field of 15 kOe under a molding pressure of 1 to
Compression molding was performed at n/cm2.
（熱処理）
焼結を１１９５℃で５時間、溶体化処理を１１６０℃で
２時間行い、８００°Ｃで５時維持した後、１℃／分の
冷却速度で４００℃まで冷却した。(Heat treatment) Sintering was performed at 1195° C. for 5 hours, solution treatment was performed at 1160° C. for 2 hours, maintained at 800° C. for 5 hours, and then cooled to 400° C. at a cooling rate of 1° C./min.
（測定結果）
本発明方法と従来方法とにより得られた希土類永久磁石
の磁気特性の測定結果を第１表に示す。(Measurement Results) Table 1 shows the measurement results of the magnetic properties of rare earth permanent magnets obtained by the method of the present invention and the conventional method.
第１表
このように希土類酸化物を別に添加するとｉＨｃ及びＢ
Ｈｍａｘが大きくなる。Table 1: When rare earth oxides are added separately, iHc and B
Hmax increases.
［実施例２］
（合金の組成）
Ｓｍ＝２５．２−ｘ重量％、Ｆｅ＝１２．９重量％、Ｃ
ｕ−６，１重量％、Ｚｒ＝２．３重量％、Ｓｍｚ Ｏ：
ｌ ＝ｘ重量％、残部がＣＯからなる。[Example 2] (Alloy composition) Sm = 25.2-x weight %, Fe = 12.9 weight %, C
u-6, 1% by weight, Zr=2.3% by weight, Smz O:
l = x% by weight, the remainder consisting of CO.
（前工程） 実施例１の前工程ａに同じ。(pre-process) Same as previous step a of Example 1.
（熱処理） 実施例１に同じ。(Heat treatment) Same as Example 1.
（測定結果）
Ｓｍ、０２量Ｘ（重量％）に対する磁気特性（Ｂ ｒ、
ｉ Ｈｃ、 ＢＨｍａｘ ）の測定結果を第１図に
示す。Ｓｍ２Ｏｉを添加することによりＢＨｍａｘが大
きくなり、且つｉＨｃが１４ｋＯｅ以上の高保磁力タイ
プの永久磁石を製造できることが判る。(Measurement results) Magnetic properties (Br,
The measurement results of iHc, BHmax) are shown in FIG. It can be seen that by adding Sm2Oi, a high coercive force type permanent magnet with an increased BHmax and an iHc of 14 kOe or more can be manufactured.
［実施例３コ
（合金の組成）
Ｓｍ＝２５．１−ｘ重量％、Ｆｅ＝１３．１重量％、Ｃ
ｕ＝７．２重量％、Ｚｒ＝１．９重量％、Ｓｍｌ Ｏ，
＝ｘ重重量、残部がＣｏからなる。[Example 3 (alloy composition) Sm = 25.1-x wt%, Fe = 13.1 wt%, C
u=7.2% by weight, Zr=1.9% by weight, SmlO,
= x weight, the remainder being Co.
（前工程） 実施例１の前工程ａに同じ。(pre-process) Same as previous step a of Example 1.
（熱処理） 実施例１に同じ。(Heat treatment) Same as Example 1.
（測定結果）
Ｓｍｚ ｏ３量Ｘ（重量％）に対する磁気特性（Ｂｒ、
ｉＨｃ、ＢＨｍａｘ ）の測定結果を第２図に示す。Ｓ
ｍｚ ｏｆｆ量Ｘ（重量％）が１０重量％を超えると添
加前のＢＨｍａｙよりも低くなってしまう。(Measurement results) Magnetic properties (Br,
The measurement results of iHc, BHmax) are shown in FIG. S
If the mz off amount X (wt%) exceeds 10 wt%, it will be lower than the BHmay before addition.
［実施例４］
（合金の組成）
Ｓｍ＝２４．９−ｘ重量％、Ｆｅ＝１３．１重量％、Ｃ
ｕ＝７．２重量％、Ｚｒ＝１．９重量％、Ｎｄ２Ｏ，＝
ｘ重量％、残部がＣＯからなる。[Example 4] (Alloy composition) Sm = 24.9-x wt%, Fe = 13.1 wt%, C
u=7.2% by weight, Zr=1.9% by weight, Nd2O,=
x% by weight, the balance consisting of CO.
（前工程） 実施例１の前工程ａに同じ。(pre-process) Same as previous step a of Example 1.
（熱処理） 実施例１に同じ。(Heat treatment) Same as Example 1.
（測定結果）
Ｎｄ２Ｏ３量Ｘ（重量％）に対する磁気特性（Ｂｒ、ｉ
Ｈｃ、ＢＨｍａに）の測定結果を第３図に示す。Ｎ ｄ
２Ｏ ｘ量Ｘ（重量％）が１０重量％を超えると添加
前のＢＨｍａｘよりも低くなってしまう。(Measurement results) Magnetic properties (Br, i
Figure 3 shows the measurement results for Hc and BHma. Nd
If the 2O x amount X (wt%) exceeds 10 wt%, the BHmax will be lower than before addition.
［発明の効果］ 本発明は上記のような特定組成のＲ−Ｃ。[Effect of the invention] The present invention relates to an R-C having a specific composition as described above.
Ｆｅ−Ｃｕ−Ｚｒ系の合金材料に、Ｓｍ及び／又はＮｄ
の酸化物を適量添加して成形し焼結する方法であるから
、従来技術より保磁力（ｉＨＣ）が向上し、より高い最
大エネルギー積（ＢＨｍａｘ ）を発生させることがで
きる。Sm and/or Nd is added to the Fe-Cu-Zr alloy material.
Since this is a method of adding an appropriate amount of oxide, forming and sintering, the coercive force (iHC) is improved compared to the conventional technology, and a higher maximum energy product (BHmax) can be generated.
第１図及び第２図ははそれぞれＳｍｚＯｉ量Ｘに対する
磁気特性の変化を示すグラフ、第３図はＮ ｄ ｚ Ｏ
：＋量Ｘに対する磁気特性の変化を示すグラフである。
特許出願人 富士電気化学株式会社Figures 1 and 2 are graphs showing changes in magnetic properties with respect to SmzOi amount X, respectively, and Figure 3 is a graph of N d z O
:+ is a graph showing changes in magnetic properties with respect to amount X. Patent applicant Fuji Electrochemical Co., Ltd.
Claims (1)
む希土類元素の１種もしくは２種以上）、５〜１６重量
％のＦｅ、１〜１０重量％のＣｕ、０．５〜６重量％の
Ｚｒ、０．０５〜１０重量％のＸ（但しＸはＳｍ＿２Ｏ
＿３及び／又はＮｄ＿２Ｏ＿３）、残部が実質的にＣｏ
からなる材料を、成形し焼結することを特徴とする希土
類永久磁石の製造方法。1.12-28% by weight of R (wherein R is one or more rare earth elements including yttrium), 5-16% by weight of Fe, 1-10% by weight of Cu, 0.5-6% by weight of Zr, 0.05 to 10% by weight of X (where X is Sm_2O
_3 and/or Nd_2O_3), the remainder being substantially Co
A method for producing a rare earth permanent magnet, which comprises forming and sintering a material consisting of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63282218A JPH02128404A (en) | 1988-11-08 | 1988-11-08 | Manufacture of rare-earth permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63282218A JPH02128404A (en) | 1988-11-08 | 1988-11-08 | Manufacture of rare-earth permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02128404A true JPH02128404A (en) | 1990-05-16 |
Family
ID=17649597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63282218A Pending JPH02128404A (en) | 1988-11-08 | 1988-11-08 | Manufacture of rare-earth permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02128404A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007300790A (en) * | 2000-07-31 | 2007-11-15 | Shin Etsu Chem Co Ltd | Method for using rare earth sintered magnet |
| US20180151276A1 (en) * | 2016-11-28 | 2018-05-31 | Ningbo Co-Star Materials Hi-Tech Co., Ltd. | Rare earth-cobalt-based composite magnetic material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104203A (en) * | 1980-12-22 | 1982-06-29 | Namiki Precision Jewel Co Ltd | Production of permanent magnet alloy |
| JPS60211032A (en) * | 1984-02-13 | 1985-10-23 | シエリツト・ゴ−ドン・マインズ・リミテツド | Sm2co17 alloy suitable for use as permanent magnet |
| JPS63114927A (en) * | 1986-11-04 | 1988-05-19 | Hitachi Metals Ltd | Production of permanent magnet alloy |
| JPS63118042A (en) * | 1986-11-05 | 1988-05-23 | Hitachi Metals Ltd | Permanent magnet material and its production |
-
1988
- 1988-11-08 JP JP63282218A patent/JPH02128404A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104203A (en) * | 1980-12-22 | 1982-06-29 | Namiki Precision Jewel Co Ltd | Production of permanent magnet alloy |
| JPS60211032A (en) * | 1984-02-13 | 1985-10-23 | シエリツト・ゴ−ドン・マインズ・リミテツド | Sm2co17 alloy suitable for use as permanent magnet |
| JPS63114927A (en) * | 1986-11-04 | 1988-05-19 | Hitachi Metals Ltd | Production of permanent magnet alloy |
| JPS63118042A (en) * | 1986-11-05 | 1988-05-23 | Hitachi Metals Ltd | Permanent magnet material and its production |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007300790A (en) * | 2000-07-31 | 2007-11-15 | Shin Etsu Chem Co Ltd | Method for using rare earth sintered magnet |
| US20180151276A1 (en) * | 2016-11-28 | 2018-05-31 | Ningbo Co-Star Materials Hi-Tech Co., Ltd. | Rare earth-cobalt-based composite magnetic material |
| JP2018088516A (en) * | 2016-11-28 | 2018-06-07 | 寧波科星材料科技有限公司Ｎｉｎｇｂｏ Ｃｏ−ｓｔａｒ Ｍａｔｅｒｉａｌｓ Ｈｉ−Ｔｅｃｈ Ｃｏ．， Ｌｔｄ． | Composite magnetic material |
| US10535451B2 (en) * | 2016-11-28 | 2020-01-14 | Ningbo Co-Star Materials Hi-Tech Co., Ltd. | Rare earth-cobalt-based composite magnetic material |
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